CSS Animation Previewer
Preview and test CSS animations in real-time
@keyframes fadeIn {
from { opacity: 0; }
to { opacity: 1; }
}
.animated {
animation: fadeIn 1s ease infinite;
}
Free CSS Animation Previewer Tool
The CSS Animation Previewer is a free online tool designed for web developers, designers, and front-end engineers who want to test and preview CSS animations before implementing them in production code. Instead of writing animation code and refreshing your browser repeatedly, this tool lets you tweak animation parameters and see results instantly.
Why Preview Animations Before Implementation?
Animation timing and easing significantly impact user experience. An animation that looks smooth in your head might feel sluggish or janky in reality. The CSS Animation Previewer eliminates guesswork by letting you experiment with different durations, delays, timing functions, and animation types. You can try a 500ms ease-out fade before deciding if 1000ms ease-in-out would be better for your UI.
Available Animation Presets
Fade In: Simple opacity transition from transparent to opaque—perfect for initial page load effects. Slide In: Element slides in from the left while fading in—great for navigation menus and cards. Bounce In: Playful bounce effect with scale transformation—ideal for attention-grabbing buttons and modals. Pulse: Subtle opacity pulsing—excellent for indicating active states or loading status. Rotate 360: Full rotation animation—useful for loading spinners and rotational transitions. Swing: Pendulum-like swing motion—adds personality to hover states and interactions.
How to Use the CSS Animation Previewer
Step 1: Select an animation type from the dropdown menu. The preview updates instantly. Step 2: Adjust the duration in milliseconds (how long the animation takes). Step 3: Set the delay if you want the animation to start after a pause. Step 4: Choose a timing function that controls the animation's acceleration and deceleration. Step 5: Set iteration count for how many times the animation repeats. Step 6: Click "Copy CSS Code" to copy the generated code to your clipboard and paste it into your project.
Understanding Timing Functions
Linear: Constant speed throughout the animation—useful for rotating elements. Ease: Starts slowly, accelerates, then slows at the end—most natural for most animations. Ease In: Slow start, normal end—good for elements entering the viewport. Ease Out: Normal start, slow end—perfect for elements leaving or settling into place. Ease In Out: Slow on both ends with acceleration in the middle—creates smooth, professional motion.
Perfect For:
- Front-End Developers: Test animation timing before production deployment
- Web Designers: Prototype motion and interaction effects
- UX/UI Designers: Evaluate animation's impact on user experience
- Learning CSS: Understand how animation properties work interactively
- Performance Testing: Check animation smoothness and frame rates
- Client Presentations: Show animation effects during design presentations
Browser Compatibility
All animations use standard CSS3 syntax compatible with modern browsers (Chrome, Firefox, Safari, Edge). Some animations may require vendor prefixes (-webkit-, -moz-) for older browser versions. The generated CSS automatically handles common compatibility needs.
Start previewing CSS animations now. Test different timings and effects instantly to create smooth, professional animations for your web projects.
Frequently Asked Questions
The previewer includes fade, slide, bounce, pulse, rotate, and swing animations. Each is a complete, copy-ready CSS animation you can customize.
Yes, you can adjust duration (milliseconds), delay, timing function (ease, linear, ease-in, ease-out), and iteration count completely.
Click the 'Copy CSS Code' button to copy the complete animation code including @keyframes and animation properties to your clipboard.
Yes, all standard CSS timing functions are supported: linear, ease, ease-in, ease-out, and ease-in-out for complete animation control.
Yes, all generated animations use standard CSS3 syntax and work in all modern browsers including Chrome, Firefox, Safari, and Edge.
The previewer shows a demo box, but the generated CSS works on any element. Just apply the animation class to your target elements.
Copy the CSS code for permanent storage. You can also bookmark specific configurations in your browser for quick access later.